Steam-boiler.



D. S. JACOBUS.

STEAM BOILER.

APPLICATION FILED APR. 1. |911.

2 SHEETS-SHEET l- //2/I ATTORNEYS.

Patented Jan. 8, 1918.

D. s. 1Acous.

STEAM olLER.

APPLICATION FILED APR. 7. I9I1.

492525444; Patented Jan. 8,1918.

2 SHEETS-SHEET 2.

/m A TTORNEYS.

- 'nected drums.

@FFQE Devin s.y tacones, or JERSEY Grrr, NEW JEitsEY, Alssrenor, 'ro THE Bassoon e wrLcoX COMPANY, or BAYONNE, NEW JERSEY, n coEroEArron or NEW JERSEY.

STEAM-Bomen.

1,2529ddi.

Speciication of Letters Vetent.

Patented dan.. 8, i913.,

To all whom t may concer-1: I

`175e it known that l, DAVID S. JAooBUs, a citizen of the Unitedv States,- residing at Jersey City, county et Hudson, and State of New Jersey, have invented certain new and useful Improvements in Steam-Boilers, oi

which the followingy is'a specification.

My invention relates to steam boilers and more partlcularly to those of the general Stirling type and will be understoodby reference to the-accompanying drawings .in which ligurev 17's a vertical longitudinal section; lfig. 2 a detail of the dryl pipe in therear'stearn and water drum; and Figs. 3 and e top views of the drums with different arrangements of the steam circulators. Similar reference numerals indicate 'similar parts in the several views.

The boiler shown comprises three transverse upper steam and water drums, 1, 2 and 3, connected by banks of tubes 4, 5 and 6 to axnud drum 7. l may use a single mud drum as shown, or a series of connected mud drums and interni` to cover both construc-y tions by the word lower chamber in the claims. The three upper drums must, however, be connected to this chamber whether it is in the form of one drum or several cn- 'Ihe steamspaces of the front and middle steamand water drums are connected by circulators 8, and the steam spaces of the middle andrear steam and water-.drums are connected by circulators 9. The water spaces of the front and middle drums are connected by cirulators '10 which support ,tiling-11, as shown. In the present form thereV are no w'at'e'r circulators between the middle and rear steam andwater drums. r A

rlhe baflling shown is that of the standard Stirlin boiler, that is, the rear row of iiie 12 extending'vupwardly from the mud drum'- to the upper part of the banlnand a'. baille' 13 is supported upon the rear row of tubes of the middle bank vextending; downwardly from the middle steam and wate'rj drum.

Horizontal shelves 14 extend from the rear wall of the settin toward'- the reary bank. The boiler may be a.bred by' anysuitable furnace. The gases How upwardly 'alongand among the4 tubes ofthe front bank and 'after crossing the' top" of said bank. lo'w into the chamber 1-5,v thence in aV general downward tubes.

direction over and among the tubes of the middle bank, thence upward over the tubes of the rear bank to the outlet 16. lf desired, a superheater may be placed in the chamber 15 between the front and middle banks oi' 'in the form shown in Fig. 1, the superheater comprises the boxes 17 and l18 towhich the u wardly projecting U-tubes 19 are. oonnected rIhe boxes are supported in saddles restingl upon the cross beam Q0 forming part ofthe structural work of the setting. The tubes 19 areshown as extend-1 ing substantiall, parallel with the tubes of the middle bank, their ends being in 'close' proximity to the middle steam and water drum. Clamps 21 secured to the front row of tubes of the middle bank serve as supw ports for resisting the overturning moment of vthe-supe'rheater".

in the standard Stirlingboiler the front and rear steam and water drums are on substantial-lji,T the same level and below the middle drum, and the main steam outlet is placed on top of the middle drum. ln the construction here shown, the rear steam and water drum is set higher than the usual practice and is lsubstantially at as hi h a' level as the middle steam and water rum, and the main steam outlet 22 is placed on the top of therear drum and leads to the superheater inlet box 17. Experiments have demonstrated that the water level in the rear' drum; of a standard Stirling boiler, with the steam space in the niiddle drum interconnected. to both the front and rear drums by steam circulatingy tubes, is higher onder certain conditions of operation with a water containing a material amount ot elements in solutionthan it is with a purer water. lt is'l therefore, not only advantageous but highly important, to raise the rear drum to the' level of the middle drum,

when the feed water is of suchnaturethatit will lead to high concentrations in the water containedA in the boiler.

-diced-pipe 23 enters the rear drum 3 and discharges into a' trough 3 whichA distributes the' feed water from end to end ofthe drum. This use of the trough .for distributing the water causes a general cooling of the waiter in the rear bank of tubes from end to end of the drum. The introduction of the feed wa.-

ter' into the rear steam and water drum serves an' important function in cooling the water in the rear drum and the, rear bank of l' tubes, thereby causing thewater level in the rear drum to be lower than it would be if not so cooled, and lower than the water level in the middle and front drums, such lower water level giving a greater steam space in the rear drum, and this is advantageous in causing drier steam to enter the dry pipe in,`

the upper part `ofwthe rear drum. lVhen the boiler is called upon to generate its maximum capacity, the ebullition of the water in the front and middle banks of tubes causes numerous steam bubbles to be formed in the tubes which reduces the density of the mixture of water and contained steam. As the density'of the Water in the rear bank is nearly constant, on account of the cooling action of the feed water introduced into the rear drum, the water level in the rear drum will fall Kto' such an extent that there will be no waterfin the rear drum, at high capacities, other than the feed water which iiows through it. This leads to a maximum steam spacel in the rear drum when it is imost desired, that is when the boiler is driven at its maximum capacity and when it is most likely to prime.

. In the steam space of the rear drum is placed a dry pipe 24, the main steam outlet 22 connecting with said pipe kat about thecenter of the latter. The pipe 24l has openings 25 therein near its ends, as shown in Fig. 2. A yplate 26 is placed in the rear drum between the ends ofthe steam circu- 'lators '9 and the dry pipe 24 to deflect any water in the steam toward the bottom of the drum.

The steam circulators 9 for ordinary water conditions will be arranged parallel and will run directly from the middle steam and water drum to the rear steam and Water drum as indicated in Fig. 3. For water containing impurities which tend to produce foaming and priming, I prefer to arrange the steam circulators 9 as indicated in Fig. 4, that isin two groups, extending from near the ends of the middle steam and water drum 'to the center of the `rear steam and Water drum. i By so arranging the circulators 9, the steam will be taken from the middle steam and water drum 2 where it is in the most quiescent state in that drum,fand will be discharged into the middle portion of the rear steam and water drum 3. By admitting the steam into the, dry pipe, very near' the ends of the rear steam and-water drum, as indicated in Fig. 2, steam of the maximum drynesswill be obtained should Water be carried over from the middle drum and'O between the shell sheet and the tube sheet of said drums. In the present form this protection is afforded by'a special balile- 27 extending from the middle steam and water drum at a point below the butt-strap 2 9.

to substantially the under side of the rear steam and Water `drum below the butt-strap- 30. -I have shown a sectional metallic battle of cast iron, without brick protection, sup-y ported from above by rods 28.' By using a baille such as 27 there is no danger of over-v heating the rear steam and water drum when the boiler is run at high ratings and the water level falls in the rear drum. The baiie 27 also prevents over-heating at the buttstraps 29 and 30. l

What I claim and desire to secure by Letters Patent of the United States is 1. A steam boiler of the class described comprising at least three upper transverse drums vconnected by banks of tubes to -va lower water chamber, the rear upper drum being set vat a higher level vthanthe front upper drum, a feed waterinlet leading into the rear upper drum, a main steam oii'take leading from said. rear drum, baiiies -for directing the-gases over and among the tubes of said banks with an 11p-pass in the rear bank, and a special baiile extending rear- Wardly from the middle upper drum and ar` ranged ,to direct the gases leaving the upper part of the rear bank so as to protect the middle and rear drums from. excessive heating.

2. A comprising at least three upper transverse drums connected by banks of tubes toa lower water chamber, the middle and rear upper drums being set at lsubstantially the same level and at a higher level than the front upper drum, a feed water inlet leading into the rear upper drum, a main steam olftake leading from said rear drum, battlesl for directing the gases over and among the tubes of said banks with an u -pass in the rear bank, and a special ba e extending rearwardly from the middle kupper drum and arranged to direct the gases leaving the upper part of the rearbank so as to protect the middle and rear drums from excessive Y heating. l

3. A steam boiler of the class ydescribedl comprising' at least three uppe'rftransverse. l.

connectedl by banksof tubes to a lower water chamber, the rear upper drum being at substantially the same level as the middle upper drum, a feed water inlet leading into th `rear upper drum, a main steam offtake leading from said rear drum, baiies for directing the gases over and among the tubes of said banks with an up-pass in the rear bank, `and a special battle extending rearwardly from the mid'dle upper drum and arranged to direct the gases leaving the upper part ofv the rear bank so as to protect the middle and rear drums from excessive heating.

4. A steam boiler of the class described comprising at least three upper transverse drums connected byv banks of tubes to a lower water chamber, the rear upper drum being set atv a higher lever than the front upper drum, a feed Water inlet leading into the rearupper drum, a main steam otake leading from said rear drum, water circulators connecting the water spaces of the front and middle drums, baffles for directing the gases over and among the tubes of said banks with an up-pass in the rear bank, and a special baiie extending rearwardly from the middle upper drum and arranged to direct the gases leaving the upper part of the rear bank so as to protect the middle and rear drums from excessive heating.

5. A steam boiler of the class described comprising at least three upper transverse drums connected by banks of tubes to a lower Water chamber, a dry pipe in the rear upper drum, said dry pi e having steam inlet openings near the en s thereof, a main steam outlet connected to said dry pipe, and steam circulators extending from near the `ends of the middle steam and water drum to the center portion of the rear upper drum.

6. A steam boiler of the classy described comprising at least three upper transverse steam and water drums connected by banks of tubes to a lower water chamber, the rear steam and water drum being set at as high a level as the middle steam 'and waterdrum, a feed water inlet leading into the rear drum, a dry pipe in said rear drum and a. main steam otake leading from said dry pipe, said dry pipe having steam inlet openings near the ends thereof, and steam circulators extending from the ends of the middle steam and water drum to about the center of the rear steam and water drum.

f7.' A steam boiler of the class described comprising at least three upper transverse drums connected by banks of tubes to a lower water chamber, the rear upper drum being set at a higher level than the front upper drum, a main steam oitake leading from said rear drum, baliies for directinggases over and among the tubes of said banks with an up-pass in the rear bank, and means to protect the middle and rear drums from excessive heating.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses,

DAVID S. JACOBUS. Witnesses:

EDITH CAMP, JOHN A. W. DIXON. 

